ANSI ASME CLASS 300 LONG WELD NECK FLANGES

ANSI ASME B16.5 CLASS 300 LONG WELD NECK FLANGE DIMENSIONS, ANSI ASME B16.5 CLASS 300 LONG WELD NECK FLANGE BOLT CHART, ANSI ASME B16.5 CLASS 300 LONG WELD NECK FLANGE WEIGHT

Ask for Quote

ANSI ASME B16.5 Class 300 Long Weld Neck Flange Manufacturer Supplier Distributors

ANSI ASME B16.5 Class #300 Long Weld Neck Flange Weight

ANSI ASME B16.5 Class 300psi Long Weld Neck Flange Bolt Chart

ASME B16.5 Class 300 Long Weld Neck Flanges are specifically designed for moderate-pressure piping systems where structural integrity and secure weld connections are essential. Also known as LWNRF #300, LWNFF #300, or simply LWN Flanges #300, these flanges feature an extended neck that provides reinforcement and smooth flow transition, reducing stress at the base of the flange. Tesco Steel & Engineering manufactures top-grade Class 300 long weld neck flanges that meet all ASME B16.5 standards, making them a reliable choice for industries such as oil & gas, petrochemicals, power generation, and shipbuilding.

Produced in our state-of-the-art Mumbai factory, these flanges benefit from the latest in machining technology, automated production systems, and rigorous inspection processes. Tesco Steel & Engineering is known for its superior quality manufacturing, delivering LWN flanges that are dimensionally precise, corrosion-resistant, and built to perform under continuous thermal and mechanical stress. Our expert team ensures that each flange undergoes thorough testing to guarantee flawless welding compatibility and long-term durability, even in challenging environments.

Tesco Steel & Engineering proudly exports ASME B16.5 Class 300 long weld neck flanges to clients across the USA, Germany, France, Italy, Saudi Arabia, UAE, and Oman. Our flanges are trusted by EPC contractors, OEMs, and plant operators worldwide for their reliability and compliance with international standards. With a reputation built on precision, innovation, and customer satisfaction, we continue to serve a diverse range of industries that demand robust, high-performance piping components.

Class 300 Weld Neck Flange Dimensions as per ASME B16.5

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	Hub OD	Weld Neck OD	RF Dia.	RF Height	PCD	Hub Length	No of Bolts	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	ISO Stud Size
		A	B	C	D	E	F	G	H
1/2	15	95	12.7	38	21.3	34.9	2	66.7	As Required	4	1/2	55	65	5/8	M14
3/4	20	115	14.3	48	26.7	42.9	2	82.6	As Required	4	5/8	65	75	3/4	M16
1	25	125	15.9	54	33.4	50.8	2	88.9	As Required	4	5/8	65	75	3/4	M16
1 1/4	32	135	17.5	64	42.2	63.5	2	98.4	As Required	4	5/8	70	85	3/4	M16
1 1/2	40	155	19.1	70	48.3	73	2	114.3	As Required	4	3/4	75	90	7/8	M20
2	50	165	20.7	84	60.3	92.1	2	127	As Required	8	5/8	75	90	3/4	M16
2 1/2	65	190	23.9	100	73	104.8	2	149.2	As Required	8	3/4	85	100	7/8	M20
3	80	210	27	117	88.9	127	2	168.3	As Required	8	3/4	90	110	7/8	M20
3 1/2	90	230	28.6	133	101.6	139.7	2	184.2	As Required	8	3/4	95	110	7/8	M20
4	100	255	30.2	146	114.3	157.2	2	200	As Required	8	3/4	95	115	7/8	M20
5	125	280	33.4	178	141.3	185.7	2	235	As Required	8	3/4	110	120	7/8	M20
6	150	320	35	206	168.3	215.9	2	269.9	As Required	12	3/4	110	120	7/8	M20
8	200	380	39.7	260	219.1	269.9	2	330.2	As Required	12	7/8	120	140	1	M24
10	250	445	46.1	321	273	323.8	2	387.4	As Required	16	1	140	160	1 1/8	M27
12	300	520	49.3	375	323.8	381	2	450.8	As Required	16	1 1/8	145	170	1 1/4	M30
14	350	585	52.4	425	355.6	412.8	2	514.4	As Required	20	1 1/8	160	180	1 1/4	M30
16	400	650	55.6	483	406.4	469.9	2	571.5	As Required	20	1 1/4	165	190	1 3/8	M33
18	450	710	58.8	533	457	533.4	2	628.6	As Required	24	1 1/4	170	195	1 3/8	M33
20	500	775	62	587	508	584.2	2	685.8	As Required	24	1 1/4	185	205	1 3/8	M33
24	600	915	68.3	702	610	692.2	2	812.8	As Required	24	1 1/2	205	230	1 5/8	M39

Advantages of Using ANSI / ASME Class 300 Long Weld Neck Flanges

Long Weld Neck flanges offer several advantages over other types of flanges. These include:

Prevention of Leaks
Long Weld Neck flanges are used to seal the end of a pipe or valve, preventing the flow of fluids or gases. This helps to prevent leaks and ensures that the system remains safe and efficient.

Easy Inspection and Maintenance
Long Weld Neck flanges can be easily removed for inspection or maintenance. This helps to ensure that the system is working properly and that any issues can be addressed quickly and easily.

Flexibility
Long Weld Neck flanges are available in a variety of materials and types, making them flexible and adaptable to different applications.

Cost-Effective
Long Weld Neck flanges are generally more cost-effective than other types of flanges, making them a popular choice for many applications.

Common applications for ANSI / ASME Class 300 long weld neck flanges

Long Weld Neck Flanges are used in a variety of applications, including oil and gas, chemical, and energy. They are also used in other industries where high-pressure systems are used.

In the oil and gas industry, Long Weld Neck Flanges are used in pipelines, refineries, and offshore platforms. They are used to connect pipes and other components, and to withstand the high pressures of the system.

In the chemical industry, Long Weld Neck Flanges are used in processing plants and storage tanks. They are used to connect pipes and equipment, and to withstand the corrosive environment of the system.

In the energy industry, Long Weld Neck Flanges are used in power plants and nuclear facilities. They are used to connect pipes and other components, and to withstand the high temperatures and pressures of the system.

Price List of Long Weld Neck Flanges

Prices for ANSI / ASME Class 300 Long Weld Neck Flanges are very affordable.

Please click on the "Ask for Quote" button or click here to request the updated price list and ready stock information along with your requirement.
TESCO STEEL & ENGINEERING maintains a stock of all standard items and can export them at the best price.

LONG WELD NECK FLANGE

ANSI / ASME Class 150 Long Weld Neck Flange

ANSI / ASME Class 300 Long Weld Neck Flange

ANSI / ASME Class 400 Long Weld Neck Flange

ANSI / ASME Class 600 Long Weld Neck Flange

ANSI / ASME Class 900 Long Weld Neck Flange

ANSI / ASME Class 1500 Long Weld Neck Flange

ANSI / ASME Class 2500 Long Weld Neck Flange

Countries we export to: ANSI B16.5 Class 300 Long Weld Neck Flanges Manufacturers / Suppliers / Stockist in Kuwait, in UAE, in Germany, Saudi Arabia, West Africa, Iraq, Congo, Mexico, Bahra, Canada, Philippes, Thailand, Kenya, Oman, Malaysia, Turkey, Qatar, Sudan, Netherlands, Oman, Nigeria, Lithuania, Gabon, Russia, Vietnam, Angola, Bolivia, Indonesia, UK, Yemen, Italy, United States, Venezuela, Spain, Iran, Estonia, Kazakhstan, Algeria, Jordan, Ecuador, Portugal, Colombia, Libya, Chile, Peru, Iran, South Africa, Bangkok, Namibia, Jeddah, Afghanistan, Israel, Zambia, Macau, Morocco, Denmark, Taiwan, Norway, Belarus, North Macedonia, Lebanon, Sri Lanka, Bhutan, Bulgaria, Albania, Ukrae, Belgium, Fland, Slovokia, Tibet, Romania, France, Brazil, Tridad & Tobago, Fiji, Tunisia, Gambia, Mexico, Hungary, Zimbabwe, Mongolia, Ghana, Egypt, Kazakhstan, Czech Republic, Azerbaijan, Poland, Greece, Costa Rica, Kosovo, New Zealand, Croatia, Puerto Rico, Tanzania, Somalia.

Major Exporting Areas: ASME B16.5 #300 Long Weld Neck Flanges Manufacturers / Suppliers / Stockist in Moscow, Port-Of-Spain, Seoul, Montreal, Dubai, Kuala Lumpur, Aberdeen, Tehran, Bogota, Petaling Jaya, Melbourne, Abu Dhabi, Courbevoie, Edmonton, Ho Chi Minh City, Bangkok, Toronto, Muscat, Milan, Busan, Mexico City, Perth, La Victoria, Santiago, Rio de Janeiro, London, Karachi, Los Angeles, Manama, Geoje-si, Atyrau, Sydney, Riyadh, New York, Jeddah, Houston, Granada, Jakarta, Brisbane, Algiers, Kuwait City, Dubai, Hanoi, Doha, Al Jubail, Chiyoda, Cairo, Gimhae-si, Caracas, Lagos, Al Khobar, Madrid, Singapore, Calgary, Colombo, Ulsan, Istanbul, Ahvaz, Dammam, Dallas, Texas, Ankara, Sharjah, Vung Tau, Angola, Benin, Burundi, Botswana, Burkina Faso, Cameroon, Douala, Central African Republic, Republic of Congo, Democratic Republic of Congo, Côte d'Ivoire, Djibouti, Eritrea, Ethiopia, Equatorial Guinea, Gabon, Guinea, Kenya, Liberia,Malawi, Mali, Mauritania, Mauritius, Casablanca-Settat, Tanger-Tetouan-Al Hoceima, Fès-Meknès, Marrakesh-Safi, Oriental, Béni Mellal-Khénifra, Souss-Massa, Laâyoune-Sakia El Hamra, Rabat-Salé-Kénitra region, Mozambique, Temara, Niger, Rwanda, Senegal, Sierra Leone, Sudan, Tanzania, Togo, Uganda, Bangkok, Bangchan, Khlong Sam Wa, Gemopolis, Lard Krabang, Pathumthani, Bangkadi, Navanakorn, Samut Prakarn, Bangplee, Bangpoo, Saraburi, Nongkhae, SIL I/Land, Chachoengsao, 304 I/P, Gateway City, Wellgrow, Rayong, Amata City, Eastern Seaboard, Hemaraj Eastern Seaboard, Rojana, Soam Eastern, Chonburi, Amata Nakorn, Hemaraj Chonburi, Pinthong, Ayutthaya, Bangpa-in, Saha Ratna Nakorn, Nakornratchasima, Kabinburi, Prachinburi, HCMC, Tan Thuan Export Processing Zone, Bien Hoa, Dong Nai Province, Amata City Bien Hoa Industrial Park, Long Binh Techno Park, Binh Duong Province, Vietnam Singapore Industrial Park, My Phuoc Industrial Park, Ho Nai Industrial Zone, Bau Xeo Industrial Park, Long Thanh Industrial Zone, Long Duc Industrial Park, Duc Hao I, Tan Huong, Long Jiang, Tra Noc I/II, Hung Phu I, Hiep Phuoc Industrial Park, Phuoc Dong Industrial Park, Dinh Vu – Cat Hai Economic Zone.